html,body,#app {
    margin: 0;
    padding: 0;
    height: 100%;
}
ul,ol {
    list-style: none;
    padding: 0;
    margin: 0;
}
a {
    text-decoration: none;
    color: #000;
    font-size: 14px;
}
.flag::after {
    content: "";
    width: 0;
    height: 0;
    line-height: 0;
    display: block;
    overflow: hidden;
    clear: both;
}